Nest Learning Thermostat 3rd Gen in Stainless Steel and Nest Protect Battery Smoke and Carbon Monoxide DetectorThis smoke and carbon monoxide detector has been redesigned from the inside out to be the ultimate alarm for your home. It features an industrial grade smoke sensor, which tests itself automatically. Through smartphone alerts, you can quiet the alarm remotely; it also informs you of what is wrong in the case of an unexpected event. Its efficient sensor detects fast and slow burning fires to give you a peace of mind. The bundle includes a sleek Nest